Popping noise at the start of a loop -ACID Product Family

ACID Product Family

Subject:Popping noise at the start of a loop Posted by: superddman Date:5/13/2004 3:10:12 AM Hello, I created a pad in fl studio that I want to export as an acidized wav to use in acid. When I play the pattern in fl studio everything sounds fine. However, when I export it to acidized wav, it creates this single popping sound at the very beginning of each cycle when it's looping. It's not very loud but very noticable because this is a pad. I have tried many different export settings and here are the things i messed around with: - looping mode - has to be wrap reminder because leave and cut reminder produce gaps - sampler's interpolation: i have tried all settings and none had results - tried both checkmarked and unchecmarked "save acidized" with no results - tried with checkmarked and unchekmarked "dithering" - tried checkmarked all or unccheckmarked all "alias free ts404,HQ for all plugins,disable max poly" with no results This pad is created using Vanguard as vsti in fl studio, but the popping sound is also visible in other vstis. I would be very happy for some suggestions regarding this issue.
Subject:RE: Popping noise at the start of a loop Reply by: coolout Date:5/13/2004 4:01:20 AM check your start point. you probably have the front of the waveform being cut off. try looping from a different note or you have might have acid's auto fade creating a gap in the beginning. should be an easy fix...
Subject:RE: Popping noise at the start of a loop Reply by: superddman Date:5/13/2004 4:13:37 AM "check your start point. you probably have the front of the waveform being cut off. try looping from a different note" sorry but i don't understand what you mean. You mean I should move the first note of my pattern in fl to the right so it doesn't start right away or you mean doing something in acid? "check your start point. you probably have the front of the waveform being cut off. try looping from a different note" I tried disabling "Quick fade edit edges of audio events" in acid's preferences but that did not solve the problem.
Subject:RE: Popping noise at the start of a loop Reply by: superddman Date:5/13/2004 4:14:55 AM sorry for the mistake but the second quotes are supposed to be this: "you have might have acid's auto fade creating a gap in the beginning"
Subject:RE: Popping noise at the start of a loop Reply by: Iacobus Date:5/13/2004 10:51:49 AM Sounds like some glitching is going on during looping. Do you have the full version of Sound Forge? It has the Loop Tuner, which lets you see at a glance if the end points of your loop have equal zero crossings or matching waveform slopes (which is basically important in most cases for glitch free looping). You can then rectify anything that's wrong using any of Sound Forge's editing tools. Iacobus ------- RodelWorks - Original Music for the Unafraid mD's ACIDplanet Page Guitars 4 Kids
Subject:RE: Popping noise at the start of a loop Reply by: MikeDee Date:5/13/2004 12:12:22 PM Hi, lacobus - I'm not at my machine, so I can't check: Is the Loop Tuner available in SF 6.0e, or do I need to upgrade to v7x? Thanx in advance. Regards, Mike E. Dee
Subject:RE: Popping noise at the start of a loop Reply by: Iacobus Date:5/13/2004 1:50:53 PM Hi Mike, Yes, the Loop Tuner is in Sound Forge 6.0. Remember to go to Special>Edit Sample and specify the type of sample you want in Sound Forge. (In most cases, "Sustaining," works best.) Then open the Loop Tuner using CTRL+L on your keyboard. HTH, Iacobus ------- RodelWorks - Original Music for the Unafraid mD's ACIDplanet Page Guitars 4 Kids
Subject:RE: Popping noise at the start of a loop Reply by: MikeDee Date:5/13/2004 2:17:09 PM Very cool...gotta give it a try asap. Nice to have an additional use for SF. Thanx, Iacobus. :) Best regards, Mike E. Dee
Subject:RE: Popping noise at the start of a loop Reply by: Iacobus Date:5/13/2004 6:07:28 PM You're welcome! I forgot to add a few things: When adjusting the end points using the Loop Tuner, the "sustaining loop" markers are used. That means that more than likely, the loop you're tweaking may have to be trimmed once you get everything the way you want it. Double-click between the markers and use CTRL+T to trim or simply drag the selection out onto the workspace. In either case, make sure the ACID loop properties are the way you want them. One more thing: If you change the length of a file, you adversely affect its tempo. For example, if you have a 2 second file that's 4 beats long (in common time), that file's tempo should be exactly 120 BPM. If you end up deleting about a tenth of a second of that file, you'll end up with a 4 beat sample that fits into a tempo of about 126 BPM. Just wanted to spread that info along, as some users are surprised when they import their ACIDized samples into ACID that they made in Sound Forge don't sound right and can't understand why. Iacobus ------- RodelWorks - Original Music for the Unafraid mD's ACIDplanet Page Guitars 4 Kids
Subject:RE: Popping noise at the start of a loop Reply by: MikeDee Date:5/13/2004 6:17:56 PM Thanks again...this info is invaluable, a real time-saver. Looks like I get to keep my hair this time 'round. ;) Mike E. Dee
Subject:RE: Popping noise at the start of a loop Reply by: superddman Date:5/13/2004 6:24:22 PM great info mD! when I am in loop tuner, can I just use the "Zero Crossing RIght" and "Zero Crossing Left" buttons to create equal zero crossing or I should use some other tools? I am a bit confused of how these buttons adjust the loop so could you explain me what happenes when you use them and what is a prefarable way of using them? Do these buttons in other words remove some part of the loop? I have played around with them and after lots of trail and error i was able to improve the sound but maybe there is a technique for doing this. You also talked about matching wavform slopes. What tool could be used to adjust these slopes? Wouldn't changing the waveform slopes also change the sound? Sorry for all these questions :) TIA
Subject:RE: Popping noise at the start of a loop Reply by: superddman Date:5/13/2004 6:45:49 PM While I was writing the previous post you guys managed to post yours and you (mD) have answered my question about what happenes when you use the "Zero Crossing Left" and "Zero Crossing Right" buttons under the Loop Tuner. So I am very thankful for that. :) However, there are still couple unanswered questions from my previous post that I would be very happy to get some input. In addition, a new question arises from mD's last post. You said to trim the regions that are outside of the left and right loop points which resulted from the use of "Zero Crossing Left" and "Zero Crossing Right" buttons. But like you said, the length of the loop will change because of this adjustement and then it might not play correctly in acid. So what happenes if you just leave the outisede regions, without trimming it? Will the tempo play the same now because the length is the same? Or is there some technique of adjusting the tempo after the loop has been trimmed? Thanks again for great help and I hope you don't get annoyed with all these questions.
Subject:RE: Popping noise at the start of a loop Reply by: Iacobus Date:5/14/2004 10:33:04 PM Hi Mark, The markers are there basically only for reference, so if you leave the extraneous regions alone without trimming, ACID will take the entire sample as it is from absolute beginning to absolute end, and the tempo will remain the same. (Take note ACID will not loop using the markers defined in Sound Forge. ACID will loop the sample from end to end as it is.) You can actually timestretch the sample using Sound Forge's timestretch function (under Process>Time Stretch on Sound Forge's menu bar) with really good results. So if you shaved just a fraction of time off by using the the Loop Tuner and then trimming it, you could add that bit of time back in using the timestretch function. (You would have to note what the sample was in length before you did any trimming.) For your other questions: Try the Pencil Tool and/or the repair tools (located under Tools>Repair). You could also try some matching quick fades at the beginning and end of the sample. HTH, Iacobus ------- RodelWorks - Original Music for the Unafraid mD's ACIDplanet Page Guitars 4 Kids
Subject:RE: Popping noise at the start of a loop Reply by: superddman Date:5/14/2004 11:27:27 PM I will definitely try Time Stretch. The pencil tool seems to do the job when it comes to fixing the waveform slopes so I am greatful for that tip. Not sure how the repari tools work so I will have to read some more about it. As to quick fades, I have tried that before and can be usefull in some cases. So alot of my questiones have been ansewered. However, I still have one main issue when it comes to using "Loop Tuner". Like I have mentioned before, I am trying to fix a long loop. When I want to preview the loop with new "loop start and end positions", I click "Play Loop" button at the bottom of the Loop Tuner, and then press "Play Sample" at the top of "Loop Tuner". This makes the play head start playing from the "loop start position" and all the way to "loop end position" and then loops back(which is obvious). Is there a way to only play like from 2 seconds before the "loop end position", play until "loop end position" then loop back to "loop start position" and play 2 seconds after it, then go back again to 2 seconds before the "loop end position" and so on. So I don't have to wait like 30 seconds to listen to the entire loop, only listen to the region closely around the start and end positions?
Subject:RE: Popping noise at the start of a loop Reply by: Iacobus Date:5/16/2004 8:15:48 AM You're onto something here as that would be handy for long samples. Try using the Playlist (ALT+3 toggles as well as focuses). You can either make a selection and drag it to the Playlist (Sound Forge will prompt you for region details) or create a region and then drag it to the Playlist. (Double-click within a region to select all the contents.) Create regions for the end and beginning and add them to the Playlist. You can then replicate each playlist entry by clicking on an entry, right-clicking and then selecting, "Replicate." Then drag and drop to arrange. If the Playlist window has focus, you can start and stop playback using your keyboard's spacebar. You could also take the whole playlist and create a new sound file from it by right-clicking the list and selecting, "Convert to New." HTH, Iacobus ------- RodelWorks - Original Music for the Unafraid mD's ACIDplanet Page Guitars 4 Kids
Subject:RE: Popping noise at the start of a loop Reply by: superddman Date:5/16/2004 4:35:35 PM Thats a good feature to know about but I am afraid that it won't do the job here. Here is why. When constantly changing "loop start position" and "loop end position", I want the play head to automatically play using the new positions to test the how it's looping. However, the playlist plays entire region that you have put there. It does not see the loop end and start positions that are constatnly changing. So for the playlist to work, I would have to create new regions each time I change the loop end and start position, thus adding way more work. Therefore, I don't think this idea will work but thanks for the suggestion. Here is idea I came up with but it also has a problem. What if I cut out the middle part of the loop before doing anything, leaving only regions closely around the loop start and end positions? Then the loop is very short and I can just use the "Play Sample" button on the loop tuner. However, after adjusting the loop start and end positions so that it loops correctly, how do I then take that middle part that I cut out and snap it back in to the exact original position?
Subject:RE: Popping noise at the start of a loop Reply by: Iacobus Date:5/17/2004 10:49:26 AM Yeah, that's why my suggestion wasn't all that great in rectifying your problem. It was the only thing I could think of that was flexible enough. Your idea actually sounds better. You could cut (CTRL+X) out the area as you mentioned using a region, then paste the contents to a new file (CTRL+E). Then when you're done, copy and paste the data back in. When you cut out a region, the region markers are left behind so you can use those for reference; just click on the markers before pasting the data back in. Iacobus ------- RodelWorks - Original Music for the Unafraid mD's ACIDplanet Page Guitars 4 Kids
Subject:RE: Popping noise at the start of a loop Reply by: superddman Date:5/17/2004 2:19:54 PM cool, this works great. Thanks for your suggestions. :)

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